Karoly will still be on the security team, just not heading the team anymore.
The Drupal community would like to take this opportunity to thank Karoly for all his security team contributions in the past and look for more in the future. We also wish Heine the best in his new and challenging role.
We would like to remind all community members to take a few moments to review the past Drupal security announcements and either apply the necessary patches or upgrade to the latest version. We also would like to remind anyone who suspects a Drupal security issue to report this using the contact form (with 'security issue' in the category), and not the normal project issue process.